Gangtok weather in September
September in Gangtok: nice, soaked, with clean air — fine if you can take 28 rainy days.
#7 of 12 months in Gangtok · #676 of 897 destinations to visit in September · comfort 69/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Gangtok in September
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Gangtok climate normals — September
| Daytime high | 21°C / 70°F | 😎 nice |
|---|---|---|
| Nighttime low | 15°C / 60°F | |
| Rainfall | 607 mm / 23.9 in | ⛈ soaked |
| Rainy days | 28 days | |
| Humidity | 91% | 💦 very humid |
| Dew point | 17°C / 62°F | |
| Sunshine | 6.5 h/day | |
| Daylight | 12.3 h | |
| Wind | 5 km/h / 3 mph | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Gangtok in September — FAQ
- Is September a good time to visit Gangtok?
- September in Gangtok: nice, soaked, with clean air — fine if you can take 28 rainy days. It ranks #7 of 12 months for Gangtok on SeasonMap's comfort score (69/100).
- What is the weather like in Gangtok in September?
- In September, Gangtok averages a daily high of 21°C and a low of 15.3°C, with about 606.5 mm of rain over roughly 27.6 rainy days.
- What is the air quality in Gangtok in September?
- Gangtok has a mean US Air Quality Index of about 40 in September.